The judge in Naomi Campbell's court case against the Mirror newspaper has described her testimony as "unreliable".

Speaking in the high court, Mr Justice Morland warned Campbell's legal team he had found her to be "in many respects an unreliable witness".

The defence has consistently cast doubt on Campbell's truthfulness.

Yesterday Desmond Browne QC, acting for the Mirror, accused her of lying on a "grandiose scale" and said that taking the oath had "in no way curbed her willingness to lie and exaggerate".

The 31-year-old model is suing Mirror Group Newspapers for breach of confidence, invasion of privacy and breach of the Data Protection Act following the paper's exposé of her drug addiction last year.

She brought the case after the paper snapped her leaving a Narcotics Anonymous counselling session under the headline, "Naomi: I am a Drug Addict".

Mr Browne has tried to establish that the model has misled the public on numerous occasions about her drug addiction.

The court was also shown video footage of an interview with the US broadcaster Entertainment Inc in which Campbell claimed she was hospitalised in Gran Canaria in 1997 because she had drunk champagne whilst on antibiotics.

In fact, according to Mr Browne, this was a lie and she was suffering from a drugs overdose.